Growth Response of Trichoderma Species to Organic Solvents

Abstract

The growth response of 25 Trichoderma strains to 26 alkanols and 7 other organic solvents was examined in vitro. The sensitivity of strains considerably varied depending on their taxonomic position, thus the strains of Longibrachiatum section proved to be more tolerant than those of Pachybasium and Trichoderma sections. Significant relationship was revealed between structure of C1 -C24 alkanols and their growth inhibitory effect to Trichodermas, both efficacy and selectivity of C1 -C3 and C14 -C24 alkanols failed off the C9 -C11 alkanols. The non-alkanol solvents tested were non-toxic. The C8 -C11 alkanols used in agricultural practices exhibited noticeable toxicity to all Trichoderma strains, therefore pesticidal preparations containing these alkanols cannot be used simultaneously with Trichoderma based biopreparations.

Trichoderma: A significant fungus for agriculture and environment

“…Trichoderma spp. have shown greater tolerance for broad spectrum fungicides than many other soil microbes as it has the capacity to colonize the pesticides treated soil more rapidly (Oros et al, 2011). Trichoderma alone or their combinations with bacteria or their immobilized formulations can have great potential, as more than a few unusual contaminants can be treated at the same time and will have wider applicability, hence improving the overall cost effectiveness of the technology.…”

Mycofungicide: <i>Trichoderma</i> Based Preparation for Foliar Applications

“…pesticides even in cases, when the active ingredient did not possess fungicidal activity due to toxicity of carriers and surfactants [14] or impurities of liquid carriers. We have tested the shelf life of Trichoderma strains storing their conidia in liquid formulations that meet requirements of application (Table 3).…”

“…Since discovery of Weidling [1] large Trichoderma based industry has been developed, and diverse ways of their use have been patented (Table 1) as well as several hundred Trichoderma based preparations have been commercialized to prevent yield losses caused by phytopathogenic microbes [11]. These mycofungicides -mostly selected strains of T. harzianum and T. viride -perform well both in laboratory and model applications, but sometimes are less effective in the field where strains must tolerate a wide range of climatic, edaphic and biotic factors [10] [12] [13] [14]. We should remark that some T. harzianum strains seemingly are in reality T. asperellum, thus the taxonomic position of strains needs verification applying recent molecular methods [15].…”

“…In the cases of integrated use the sensitivity of the antagonist to inert ingredients (surfactants, liquid or solid carriers, etc.) can also be a restricting factor [14]. Nevertheless, the liquid formulations containing Trichoderma propagules has great advantages thus we started to develop an eubiotic preparate based on organic carrier that might open a possibility to decrease the specific rate of use and the foliar application of such biofungicide.…”

Application of the Principal Component Analysis to Disclose Factors Influencing on the Composition of Fungal Consortia Deteriorating Remained Fruit Stalks on Sour Cherry Trees

“…In last decade, however, the grave infection has evolved in each season that resulted in disastrous yield losses and led to decrease of harvested area at about 25 %. Series of control measures were tried out, many of them with success with some degree (Børve & Stensvand, 2006;Børve et al, 2010), among them a newly developed biocontrol preparation was applied (Oros & Naár, 2008;Oros et al, 2011). Detailed analysis of weak efficiency of disease control revealed that beside C. gloeosporioides four other anamorphs of Glomerella were present (Table 1), among them C. acutatum (J.H.…”